From the release announcement: "Almost a year ago we started building a set of Mono bindings for building native MacOS X applications. Our original goals were modest: bind enough of AppKit that you could build native desktop applications for OSX using C# or your favorite .NET language. We leveraged a lot of the code that we built for MonoTouch our binding to the CocoaTouch APIs."

Yes but, as I understand it, having all languages run on top of Mono(.NET / CLR(Common Language Runtime)) platform means if you write framework in C# for example its automatically available from from other .NET compatible languages, without having to write any bindings.